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 <h2 class="title">安装</h2>
 <p class="para">
  To be able to use the functions defined in this
  module you must compile your PHP interpreter using the
  <strong class="option configure">--with-recode[=DIR]</strong>

  option.
 </p>
 <div class="warning"><strong class="warning">Warning</strong>
  <p class="para">
   Crashes and startup problems of PHP may be encountered
   when loading the recode as extension <em class="emphasis">after</em> loading any extension of <a href="ref.mysql.html" class="link">mysql</a> or <a href="ref.imap.html" class="link">imap</a>. Loading the recode before those
   extension has proved to fix the problem.  This is due a technical problem
   that both the c-client library used by imap and recode have their own
   <em>hash_lookup()</em> function and both mysql and recode have
   their own <em>hash_insert</em> function.
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 <div class="warning"><strong class="warning">Warning</strong><p class="simpara"><a href="book.imap.html" class="link">IMAP</a>，<a href="book.recode.html" class="link">recode</a>，<a href="book.yaz.html" class="link">YAZ</a> 和 <a href="book.cyrus.html" class="link">Cyrus</a> 扩展不能同时使用，因为它们共享了相同 的内部符号。注意：Yaz
2.0 及以上版本不存在此问题。</p></div>

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